With Zero Dark Thirty, sound designer and re-recording mixer Paul Ottosson continued the collaboration with director Kathryn Bigelow that started with The Hurt Locker – a partnership, which garnered him two Oscar wins. "We have a lot of the same views, in regards to sound," said Ottosson. "Neither one of us is looking for polished tracks. They need to be organic. It can’t sound like a documentary, but it has to have a raw and gritty feel, true to the subject at hand."